question_answer

  Give reasons :.                                   (i)value foris low. (ii)value for for is high. (iii)value for relatively high. (iv) value for relatively low. (v) value for is comparatively low.

Answer:

  (i) The value of  for  is low because  has a noble gas configuration and is stable. Hence it has tendency of reduction. (ii)  has stable  configuration thus further removal of an electron from it is difficult So, foris high. . (iii)  for  is relatively high because  has stable half filled  configuration from which electron removal is difficult. (iv) The low E° for  is due to extra stability of due to half filled  configuration. (v) The low value of  is due to extra stability of  due to half filled  level.